排序方式: 共有41条查询结果,搜索用时 15 毫秒
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黄天其 《计算机应用与软件》2006,23(7):131-133
对在蜂窝通信系统中引入自组网模式进行了分析,概述了目前提出的各种整合方案。提出在蜂窝通信系统与无线局域网整合的基础上,快速结合蜂窝通信系统与无线自组网的方案,并分析了此方案中自组网路由协议应该考虑的因素。 相似文献
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A system procedure is proposed for a multi-robot rescue system that performs real-time exploration over disaster areas. Real-time exploration means that every robot exploring the area always has a communication path to human operators standing by at a base station and that the communication path is configured by ad hoc wireless networking. Real-time exploration is essential in multi-robot systems for USAR (urban search and rescue) because operators must communicate with every robot to support the victim detection process and ad hoc networking is suitable to configure a communication path among obstacles. The proposed system procedure consists of the autonomous classification of robots into search and relay types and behavior algorithms for each class of robot. Search robots explore the areas and relay robots act as relay terminals between search robots and the base station. The rule of the classification and the behavior algorithm refer to the forwarding table of each robot constructed for ad hoc networking. The table construction is based on DSDV (destination-sequenced distance vector) routing that informs each robot of its topological position in the network and other essentials. Computer simulations are executed with a specific exploration strategy of search robots. The results show that a multi-robot rescue system can perform real-time exploration with the proposed system procedure and reduce exploration time in comparison with the case where the proposed scheme is not adopted. 相似文献
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本文简要介绍了车载自组织网络和移动自组织网络中两个典型的路由协议:表驱动路由协议DSDV和按需路由协议AODV;还介绍了一个实用的移动模型,使仿真实验更加接近现实。在Linux下使用网络仿真工具NS2对这两个典型协议进行仿真,并对仿真结果进行分析比较和性能评价,得出:AODV和DSDV协议都不太适用于车辆自组织网络,所以设计适合车辆网路的协议是急需解决的问题。 相似文献
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在Ad Hoc网络中,如何基于多信道有效地利用网络中的频谱资源,提高网络的性能,已经成为近几年来研究的热点。在DSDV路由协议的基础上,提出了一种基于减少网络中的信道切换的路由算法——OLCH-DSDV,该算法采用最小切换时延的信道分配策略,尽量减少信道切换产生的时延,从而降低了网络时延,提高了吞吐量。该算法要求源节点通过自身维护的路由和信道使用信息,选择到达目的节点的最优路径,也就是需要最少信道切换的路径。仿真结果表明该路由改进算法在有效提高系统吞吐量的同时,也有效地减少了网络中的传输时延。 相似文献
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ZHAO Xian-jing ZHENG Bao-yu CHEN Chao Institute of Signal Information Processing Nanjing University of Posts Telecommunications Nanjing China 《中国邮电高校学报(英文版)》2007,14(1):16-21
A novel weighted cooperative routing algorithm (WCRA) is proposed in this article, which was on the basis of a weighted metric with maximal remaining energy (MRE) of the relays and the maximal received SNR (MRS) of the nodes. Moreover, a cooperative routing protocol was implemented on the basis of WCRA. Then simulation is done on network simulation (NS-2) platform to compare the performances of MRS, MRE and WCRA with that of noncooperative destination-sequenced destination-sequenced distance-vector (DSDV) protocol. The simulative results show that WCRA obtains a performance tradeoff between MRE and MRS in terms of delivery ratio and network lifetime, which can effectively improve the network lifetime at an acceptable loss of delivery ratio. 相似文献
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在继承传统路由协议性能评价的基础上,提出了较为清晰合理的Adhoc网络路由协议性能评价标准,并对Adhoc两种较为典型的路由协议DSDV、AODV进行仿真及性能分析.仿真结果表明AODV的稳定性要好于DSDV,但在网络拓扑变化缓慢的环境中,DSDV的分组时延较短. 相似文献
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不同网络负载的Ad Hoc网络路由协议性能分析 总被引:1,自引:0,他引:1
通过实验对一种表驱动路由协议(DSDV)以及其中两种按需式路由协议(DSR和AODV)协议的性能进行比较和分析.利用NS-2仿真软件,设计了基于不同网络负载的多组仿真模型,并根据模型进行仿真.之后从分组投递率、时延和路由负荷三个性能指标参数对仿真结果进行了比较.实验结果表明:按需式路由协议DSR和AODV要优于基于表驱动的路由协议DSDV;在两种按需式路由协议之间,随着不同网络负载的加重,AODV协议比DSR协议的性能优势越来越明显.同时分析了造成不同协议之间性能差距的原因,针对AODV协议提出了今后的改进方向. 相似文献
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MANET路由协议及其性能研究 总被引:3,自引:1,他引:3
MANET(Mobile Ad Hoe Network)是由一组无线移动主机组成的一个没有任何建立好的基础设施或集中管理设备的临时网络。网络拓扑易变、带宽、能源有限是Ad Hoc移动网络的主要特点。重点介绍了Ad hoc网络的组网关键技术——路由协议,并对现在的具有代表性的协议性能进行了比较,研究了在不同环境下的各自路由协议仿真实验所体现出来的性能差别,对Ad hoc的组网具有指导意义。 相似文献